wForget commented on PR #6017:
URL: https://github.com/apache/kyuubi/pull/6017#issuecomment-1911261176
> The behavior is decided by yourself. The new syntax also supports observe
each operator as long as you inject CollectMetrics for each operator.
How do we push down the specified aggregation expression to the previous
stage?
> CALL OBSERVE('observer1', sum(c1), count(1)) (SELECT c1 from (select a,
max(b) as c1 from t group by a))
Like this SQL, how do we apply `sum(c1)` to `select a, max(b) as c1` project?
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